Last week, Ethereum’s Sepolia testnet successfully switched to PoS. Goerli, the third and final of three public testnets, will run through the Merge process on Aug. 11. The parameters that trigger the test will be determined in the next Ethereum Foundation All-Core Developers call. These testnet merges, which served as sort of dress rehearsals for the real thing, each take developers one step closer to Ethereum’s mainnet PoS upgrade.